印刷工将遮板小心地覆盖在纸张上，以防止油墨污染特定区域。

The pressman carefully positioned the ___frisket over the paper to protect specific areas from ink.

他在丝网印刷时使用遮罩膜来保护不需要上墨的区域。

He used a ___frisket to protect the areas from ink during screen printing.